Data transmission method and apparatus

Abstract

The present invention discloses a data transmission method, apparatus, and system, and an access point. The method includes: transceiving data of a data portion in an uplink OFDMA PPDU scheduled by an access point AP on a corresponding allocated frequency resource unit RU, determining one or more fundamental channel units on which the allocated frequency resource unit RU is located, and transceiving at least some fields in a common signaling portion in the uplink OFDMA PPDU on the determined one or more fundamental channels. In this way, one or more fundamental channels for transceiving at least some fields in a common signaling portion in an uplink OFDMA PPDU are determinate, and another user can transceive data on another idle fundamental channel, thereby improving channel utilization. In addition, multiple users can simultaneously transceive data on multiple fundamental channels, thereby improving a service transmission rate.

The invention claimed is: 
     
       1. A method for transmitting an uplink Orthogonal Frequency Division Multiple Access (OFDMA) physical layer convergence protocol data unit (PPDU) in a bandwidth of plurality of fundamental channels, wherein the OFDMA PPDU comprises a data portion and a common signaling portion, and the common signaling portion comprises a legacy preamble and a high efficient signal part A (HE-SIG-A), the method comprises:
 sending, by an apparatus, the common signaling portion of the uplink OFDMA PPDU only on multiple fundamental channels, wherein an allocated frequency resource unit (RU) for the data portion of the uplink OFDMA PPDU is located across the multiple fundamental channels of the plurality of fundamental channels and the bandwidth comprises at least one fundamental channel other than the multiple fundamental channels; and 
 sending, by the apparatus, the data portion of the uplink OFDMA PPDU on the RU. 
 
     
     
       2. The method according to  claim 1 , wherein the sending, by an apparatus, the common signaling portion of the uplink OFDMA PPDU only on multiple fundamental channels, comprises:
 reduplicating, by the apparatus, only over the multiple fundamental channels where the allocated RU is located on a per fundamental channel basis, the common signaling portion of the uplink OFDMA PPDU. 
 
     
     
       3. The method according to  claim 1 , wherein the data portion of the uplink OFDMA PPDU comprises at least one of the following: uplink user data, or, uplink user medium access control (MAC) control signaling. 
     
     
       4. The method according to  claim 1 , further comprising:
 sending a short training field and a long training field of the uplink OFDMA PPDU on the allocated RU. 
 
     
     
       5. The method according to  claim 1 , wherein each fundamental channel of the plurality of fundamental channels comprises a 20 MHz channel. 
     
     
       6. The method according to  claim 1 , wherein the uplink OFDMA PPDU is based on 802.11ax standard. 
     
     
       7. A data transmission apparatus, for transmitting an uplink Orthogonal Frequency Division Multiple Access (OFDMA) physical layer convergence protocol data unit (PPDU) in a bandwidth of plurality of fundamental channels, wherein the OFDMA PPDU comprises a data portion and a common signaling portion, and the common signaling portion comprises a legacy preamble and a high efficient signal part A (HE-SIG-A), comprising:
 at least one processor; and 
 one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to: 
 send the common signaling portion of the uplink OFDMA PPDU only on multiple fundamental channels, wherein an allocated frequency resource unit (RU) for the data portion of the uplink OFDMAPPDU is located across the multiple fundamental channels of the plurality of fundamental channels and the bandwidth comprises at least one fundamental channel other than the multiple fundamental channels; and 
 send the data portion of the uplink OFDMA PPDU on the RU. 
 
     
     
       8. The apparatus according to  claim 7 , wherein the programming instructions, when executed by the at least one processor, cause the apparatus to:
 reduplicate, only over the multiple fundamental channels where the allocated RU is located on a per fundamental channel basis, the common signaling portion of the uplink OFDMA PPDU. 
 
     
     
       9. The apparatus according to  claim 7 , wherein the data portion of the uplink OFDMA PPDU comprises at least one of the following: uplink user data, or, uplink user medium access control (MAC) control signaling. 
     
     
       10. The apparatus according to  claim 7 , wherein the programming instructions, when executed by the at least one processor, cause the apparatus to:
 send a short training field and a long training field of the uplink OFDMA PPDU on the allocated RU. 
 
     
     
       11. The apparatus according to  claim 7 , wherein each fundamental channel of the plurality of fundamental channels comprises a 20 MHz channel. 
     
     
       12. The apparatus according to  claim 7 , wherein the uplink OFDMA PPDU is based on 802.11ax standard. 
     
     
       13. The apparatus according to  claim 7 , wherein the apparatus is a station. 
     
     
       14. A non-transitory computer readable medium storing a program used for transmitting an uplink Orthogonal Frequency Division Multiple Access (OFDMA) physical layer convergence protocol data unit (PPDU) in a bandwidth of plurality of fundamental channels, wherein the OFDMA PPDU comprises a data portion and a common signaling portion, and the common signaling portion comprises a legacy preamble and a high efficient signal part A (HE-SIG-A), and the program, when executed by at least one processor, causes a computing device to perform following operations:
 sending the common signaling portion of the uplink OFDMA PPDU only on multiple fundamental channels, wherein an allocated frequency resource unit (RU) for the data portion of the uplink OFDMAPPDU is located across the multiple fundamental channels of the plurality of fundamental channels and the bandwidth comprises at least one fundamental channel other than the multiple fundamental channels; and 
 sending the data portion of the uplink OFDMA PPDU on the RU. 
 
     
     
       15. The non-transitory computer readable medium according to  claim 14 , wherein the sending the common signaling portion of the uplink OFDMA PPDU only on the multiple fundamental channels comprises:
 reduplicating, only over the multiple fundamental channels where the allocated RU is located on a per fundamental channel basis, the common signaling portion of the uplink OFDMA PPDU. 
 
     
     
       16. The non-transitory computer readable medium according to  claim 14 , wherein the data portion of the uplink OFDMA PPDU comprises at least one of the following: uplink user data, or, uplink user medium access control (MAC) control signaling. 
     
     
       17. The non-transitory computer readable medium according to  claim 14 , wherein the operations further comprise:
 sending a short training field and a long training field of the uplink OFDMA PPDU on the allocated RU. 
 
     
     
       18. The non-transitory computer readable medium according to  claim 14 , wherein each fundamental channel of the plurality of fundamental channels comprises a 20 MHz channel. 
     
     
       19. The non-transitory computer readable medium according to  claim 14 , wherein the uplink OFDMA PPDU is based on 802.11ax standard.